Fix the cdns_mhdp_j721e_disable() function to clear the correct register.
The function should clear DPTX_SRC_CFG (video source configuration) instead
of DPTX_DSC_CFG (DSC configuration) when disabling the display interface.

Clearing DPTX_SRC_CFG properly resets all video source settings (VIF enable
bits and DPI selections) to their default state.

Cc: stable@vger.kernel.org
Fixes: afba7e6c5fc19 ("drm: bridge: cdns-mhdp8546: Add TI J721E wrapper")
Signed-off-by: Udit Kumar <u-kumar1@ti.com>
---
 drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.c b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.c
index 12d04be4e242..5f92436ffa0a 100644
--- a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.c
+++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.c
@@ -62,7 +62,7 @@ static void cdns_mhdp_j721e_enable(struct cdns_mhdp_device *mhdp)
 static void cdns_mhdp_j721e_disable(struct cdns_mhdp_device *mhdp)
 {
 	/* Put everything to defaults  */
-	writel(0, mhdp->j721e_regs + DPTX_DSC_CFG);
+	writel(0, mhdp->j721e_regs + DPTX_SRC_CFG);
 }
 
 const struct mhdp_platform_ops mhdp_ti_j721e_ops = {
-- 
2.34.1

On Thu, Apr 16, 2026 at 09:39:33AM +0530, Udit Kumar wrote:
> Fix the cdns_mhdp_j721e_disable() function to clear the correct register.
> The function should clear DPTX_SRC_CFG (video source configuration) instead
> of DPTX_DSC_CFG (DSC configuration) when disabling the display interface.
> 
> Clearing DPTX_SRC_CFG properly resets all video source settings (VIF enable
> bits and DPI selections) to their default state.
> 
> Cc: stable@vger.kernel.org
> Fixes: afba7e6c5fc19 ("drm: bridge: cdns-mhdp8546: Add TI J721E wrapper")
> Signed-off-by: Udit Kumar <u-kumar1@ti.com>
> ---
>  drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-j721e.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>


-- 
With best wishes
Dmitry